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1.
Nutr Neurosci ; : 1-19, 2024 Jan 29.
Artigo em Inglês | MEDLINE | ID: mdl-38287652

RESUMO

Many epidemiological studies have shown the beneficial effects of a largely plant-based diet, and the strong association between the consumption of a Mediterranean-type diet with healthy aging including a lower risk of cognitive decline. The Mediterranean diet is characterized by a high intake of olive oil, fruits and vegetables and is rich in dietary fiber and polyphenols - both of which have been postulated to act as important mediators of these benefits. Polyphenols are large molecules produced by plants to protect them from environmental threats and injury. When ingested by humans, as little as 5% of these molecules are absorbed in the small intestine with the majority metabolized by the gut microbiota into absorbable simple phenolic compounds. Flavan-3-ols, a type of flavonoid, contained in grapes, berries, pome fruits, tea, and cocoa have been associated with many beneficial effects on several risk factors for cardiovascular disease, cognitive function and brain regions involved in memory formation. Both preclinical and clinical studies suggest that these brain and heart benefits can be attributed to endothelial vascular effects and anti-inflammatory properties among others. More recently the gut microbiota has emerged as a potential modulator of the aging brain and intriguingly polyphenols have been shown to alter microbiota composition and be metabolized by different microbial species. However, there is a need for well controlled studies in large populations to identify predictors of response, particularly given the vast inter-individual variation of human gut microbiota.

2.
Tijdschr Psychiatr ; 64(6): 353-358, 2022.
Artigo em Holandês | MEDLINE | ID: mdl-35748146

RESUMO

BACKGROUND: Parenting with Love and Limits (PLL) is a family intervention aimed at reducing behavioral problems in adolescents up to the age of 18 by, among other things, improving communication between family members and the parenting skills of the parents. AIM: This prospective study examined whether parental communication and parenting skills and youth externalizing problem behavior were positively changed after PLL. METHOD: The study group consisted of 48 adolescents who had completed the PLL-intervention with their primary caregivers. Data from two measurements completed by the primary caregivers (44 mothers and 4 fathers) were used: prior to PLL (T0) and after PLL (T1). RESULTS: Results of the paired t-test indicated strong positive changes in communication, parenting and aggressive behavior after nearly eight months of PLL. A statistically significant (reliable change) decrease in aggressive behavior was found in one third of the adolescents, but not in deviant behavior. CONCLUSION: PLL improved functioning in some of the families, but further research is needed into the effective elements and for whom the intervention is effective under what circumstances.


Assuntos
Terapia Familiar , Poder Familiar , Adolescente , Comunicação , Pai , Feminino , Humanos , Relações Interpessoais , Amor , Masculino , Mães , Pais , Estudos Prospectivos
3.
BJOG ; 126(1): 33-42, 2019 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-30144277

RESUMO

OBJECTIVE: To assess the association between the outcome of a woman's first pregnancy and risk of clinical cardiovascular disease risk factors. DESIGN: Prospective cohort study. SETTING AND POPULATION: Nurses' Health Study II. METHODS: Multivariable-adjusted Cox proportional hazards models were used to compute hazard ratios (HRs) and 95% confidence intervals (CIs) for the associations between first pregnancy outcome and hypertension, type 2 diabetes, and hypercholesterolemia. MAIN OUTCOME MEASURES: Hypertension, type 2 diabetes, and hypercholesterolemia. RESULTS: Compared to women who reported a singleton live first birth, women with early spontaneous abortion (<12 weeks) had a greater rate of type 2 diabetes (HR: 1.20; 95% CI: 1.07-1.34) and hypercholesterolemia (HR: 1.06; 95% CI: 1.02-1.10), and a marginally increased rate of hypertension (HR: 1.05, 95% CI: 1.00-1.11). Late spontaneous abortion (12-19 weeks) was associated with an increased rate of type 2 diabetes (HR: 1.38; 95% CI: 1.14-1.65), hypercholesterolemia (HR: 1.11; 95% CI: 1.03-1.19), and hypertension (HR: 1.15; 95% CI: 1.05-1.25). The rates of type 2 diabetes (HR: 1.45; 95% CI: 1.13-1.87) and hypertension (HR: 1.15; 95% CI: 1.01-1.30) were higher in women who delivered stillbirth. In contrast, women whose first pregnancy ended in an induced abortion had lower rates of hypertension (HR: 0.87; 95% CI: 0.84-0.91) and type 2 diabetes (HR: 0.89; 95% CI: 0.79-0.99) than women with a singleton live birth. CONCLUSIONS: Several types of pregnancy loss were associated with an increased rate of hypertension, type 2 diabetes, and hypercholesterolemia, which may provide novel insight into the pathways through which pregnancy outcomes and CVD are linked. TWEETABLE ABSTRACT: Pregnancy loss is associated with later maternal risk of hypertension, type 2 diabetes, and hypercholesterolemia.


Assuntos
Aborto Espontâneo/epidemiologia , Diabetes Mellitus Tipo 2/epidemiologia , Hipercolesterolemia/epidemiologia , Hipertensão/epidemiologia , Resultado da Gravidez/epidemiologia , Natimorto/epidemiologia , Aborto Induzido/estatística & dados numéricos , Adulto , Intervalos de Confiança , Diabetes Mellitus Tipo 2/etiologia , Feminino , Idade Gestacional , Humanos , Hipercolesterolemia/etiologia , Hipertensão/etiologia , Gravidez , Modelos de Riscos Proporcionais , Estudos Prospectivos , Fatores de Risco , Adulto Jovem
4.
BMC Cancer ; 18(1): 318, 2018 03 23.
Artigo em Inglês | MEDLINE | ID: mdl-29566658

RESUMO

BACKGROUND: The primary objective was to determine human papilloma virus (HPV) clearance rate after cervical biopsy among women with persistent high-risk HPV infection compared with spontaneous HPV clearance rate in the absence of biopsy. METHODS: We collected data from a dedicated screening program of women aged 30-70 years old. Inclusion criteria for the baseline non-interventional cohort were a positive HPV test (hybrid capture 2, HC2) and normal cytology. In the baseline cohort women were followed with approximately yearly HPV-tests and cytology until HPV regressed (one negative HPV test) or interventions in the form of diagnostic biopsies or therapy. Women who had a diagnostic biopsy were included in the biopsy cohort and followed until HPV regression or therapy. Observed HPV regression rates and time to HPV regression were compared between baseline and biopsy cohorts. For the comparison, we used Fisher's exact test for the HPV regression rates and interval-censored, accelerated failure time model for time to HPV regression. RESULTS: Among the 1079 women included in the baseline cohort, 499 (46.3%) had HPV clearance and 475 were referred for colposcopy with biopsy. The biopsy cohort comprised all women who were not treated and had at least one HC2 test after biopsy (201/475; 42.3%). Of those, 138 (68.7%) experienced HPV regression. In the biopsy cohort, time to clearance of HPV infection was approximately halved (0.46, 95% CI 0.38-0.56) compared with the baseline cohort. This result was robust in a wide range of sensitivity analyses. CONCLUSIONS: A higher proportion of women cleared their HPV infection, and time to HPV clearance was shorter in the biopsy cohort than in the baseline cohort. It is reassuring for clinicians to know that conservative management of patients with HPV persistency is successful when colposcopy with biopsies excludes high-grade disease.


Assuntos
Papillomaviridae , Infecções por Papillomavirus/complicações , Infecções por Papillomavirus/virologia , Neoplasias do Colo do Útero/etiologia , Neoplasias do Colo do Útero/patologia , Adulto , Idoso , Biópsia , Progressão da Doença , Detecção Precoce de Câncer , Feminino , Humanos , Estimativa de Kaplan-Meier , Pessoa de Meia-Idade , Papillomaviridae/classificação , Papillomaviridae/genética , Infecções por Papillomavirus/diagnóstico , Sensibilidade e Especificidade , Neoplasias do Colo do Útero/mortalidade , Esfregaço Vaginal
5.
Tijdschr Psychiatr ; 60(10): 672-681, 2018.
Artigo em Holandês | MEDLINE | ID: mdl-30328592

RESUMO

BACKGROUND: Cutbacks in clinical beds in regular and forensic psychiatry increase the burden on outpatient forensic care in The Netherlands.
AIM: Since 2007, Dutch forensic (flexible) assertive community treatment (For(F)ACT) teams offer outpatient, intensive treatment to forensic clients with complex mental health issues. As the need for this form of intensive treatment increases, so does the need for unambiguous indication criteria to facilitate adequate care and accompanied reduction in criminal behavior.
METHOD: The present study investigated the correlation between the clinical indication criteria and risk factors for criminal behavior in 76 For(F)ACT-clients, reviewing which criteria best predicted recidivism.
RESULTS: A weak correlation was found between the indication criteria and risk factors. Further receiver operating characteristic (ROC) analysis showed that a combination of clinical indication criteria best predicted recidivism.
CONCLUSION: The influential risk factors for For(F)ACT-clients are different compared to those for other groups of delinquents. Important treatment factors are breaking patterns, increasing safety and offering social and financial support. The clinical indication criteria should not be replaced by the START risk factors.


Assuntos
Serviços Comunitários de Saúde Mental/métodos , Psiquiatria Legal , Transtornos Mentais/terapia , Reincidência/prevenção & controle , Assistência Ambulatorial , Feminino , Humanos , Masculino , Países Baixos , Reincidência/psicologia , Medição de Risco , Fatores de Risco
6.
Thorax ; 72(10): 876-883, 2017 10.
Artigo em Inglês | MEDLINE | ID: mdl-28450529

RESUMO

RATIONALE: We hypothesised that patients with acute respiratory distress syndrome (ARDS) can be clustered based on concentrations of plasma biomarkers and that the thereby identified biological phenotypes are associated with mortality. METHODS: Consecutive patients with ARDS were included in this prospective observational cohort study. Cluster analysis of 20 biomarkers of inflammation, coagulation and endothelial activation provided the phenotypes in a training cohort, not taking any outcome data into account. Logistic regression with backward selection was used to select the most predictive biomarkers, and these predicted phenotypes were validated in a separate cohort. Multivariable logistic regression was used to quantify the independent association with mortality. RESULTS: Two phenotypes were identified in 454 patients, which we named 'uninflamed' (N=218) and 'reactive' (N=236). A selection of four biomarkers (interleukin-6, interferon gamma, angiopoietin 1/2 and plasminogen activator inhibitor-1) could be used to accurately predict the phenotype in the training cohort (area under the receiver operating characteristics curve: 0.98, 95% CI 0.97 to 0.99). Mortality rates were 15.6% and 36.4% (p<0.001) in the training cohort and 13.6% and 37.5% (p<0.001) in the validation cohort (N=207). The 'reactive phenotype' was independent from confounders associated with intensive care unit mortality (training cohort: OR 1.13, 95% CI 1.04 to 1.23; validation cohort: OR 1.18, 95% CI 1.06 to 1.31). CONCLUSIONS: Patients with ARDS can be clustered into two biological phenotypes, with different mortality rates. Four biomarkers can be used to predict the phenotype with high accuracy. The phenotypes were very similar to those found in cohorts derived from randomised controlled trials, and these results may improve patient selection for future clinical trials targeting host response in patients with ARDS.


Assuntos
Biomarcadores/sangue , Síndrome do Desconforto Respiratório/sangue , Síndrome do Desconforto Respiratório/mortalidade , Idoso , Angiopoietina-1/sangue , Angiopoietina-2/sangue , Análise por Conglomerados , Feminino , Humanos , Unidades de Terapia Intensiva , Interferon gama/sangue , Interleucina-6/sangue , Masculino , Pessoa de Meia-Idade , Fenótipo , Inibidor 1 de Ativador de Plasminogênio/sangue , Valor Preditivo dos Testes , Estudos Prospectivos
7.
Int J Obes (Lond) ; 41(8): 1185-1195, 2017 08.
Artigo em Inglês | MEDLINE | ID: mdl-28360430

RESUMO

BACKGROUND/OBJECTIVES: The brain has a central role in regulating ingestive behavior in obesity. Analogous to addiction behaviors, an imbalance in the processing of rewarding and salient stimuli results in maladaptive eating behaviors that override homeostatic needs. We performed network analysis based on graph theory to examine the association between body mass index (BMI) and network measures of integrity, information flow and global communication (centrality) in reward, salience and sensorimotor regions and to identify sex-related differences in these parameters. SUBJECTS/METHODS: Structural and diffusion tensor imaging were obtained in a sample of 124 individuals (61 males and 63 females). Graph theory was applied to calculate anatomical network properties (centrality) for regions of the reward, salience and sensorimotor networks. General linear models with linear contrasts were performed to test for BMI and sex-related differences in measures of centrality, while controlling for age. RESULTS: In both males and females, individuals with high BMI (obese and overweight) had greater anatomical centrality (greater connectivity) of reward (putamen) and salience (anterior insula) network regions. Sex differences were observed both in individuals with normal and elevated BMI. In individuals with high BMI, females compared to males showed greater centrality in reward (amygdala, hippocampus and nucleus accumbens) and salience (anterior mid-cingulate cortex) regions, while males compared to females had greater centrality in reward (putamen) and sensorimotor (posterior insula) regions. CONCLUSIONS: In individuals with increased BMI, reward, salience and sensorimotor network regions are susceptible to topological restructuring in a sex-related manner. These findings highlight the influence of these regions on integrative processing of food-related stimuli and increased ingestive behavior in obesity, or in the influence of hedonic ingestion on brain topological restructuring. The observed sex differences emphasize the importance of considering sex differences in obesity pathophysiology.


Assuntos
Índice de Massa Corporal , Encéfalo/anatomia & histologia , Encéfalo/fisiologia , Vias Neurais/anatomia & histologia , Vias Neurais/fisiologia , Caracteres Sexuais , Adulto , Análise de Variância , Mapeamento Encefálico/métodos , Imagem de Difusão por Ressonância Magnética , Comportamento Alimentar/fisiologia , Comportamento Alimentar/psicologia , Feminino , Humanos , Comportamento Impulsivo/fisiologia , Masculino , Pessoa de Meia-Idade , Modelos Neurológicos , Neuroimagem , Obesidade/fisiopatologia , Obesidade/psicologia , Filosofia , Estimulação Luminosa , Recompensa , Estados Unidos , Adulto Jovem
8.
Eur J Neurol ; 24(2): 245-254, 2017 02.
Artigo em Inglês | MEDLINE | ID: mdl-27981707

RESUMO

Electroencephalographic (EEG) reactivity testing is often presented as a clear-cut element of electrophysiological testing. Absence of EEG reactivity is generally considered an indicator of poor outcome, especially in patients after cardiac arrest. However, guidelines do not clearly describe how to test for reactivity and how to evaluate the results. In a quest for clear guidelines, we performed a systematic review aimed at identifying testing methods and definitions of EEG reactivity. We systematically searched the literature between 1970 and May 2016. Methodological quality of the studies was assessed using the QUality In Prognostic Studies tool. Quality of the descriptions of stimulus protocol and reactivity definition was rated on a four-category grading scale based on reproducibility. We found that protocols for EEG reactivity testing vary greatly and descriptions of protocols are almost never replicable. Furthermore, replicable definitions of presence or absence of EEG reactivity are never provided. In order to draw firm conclusions on EEG reactivity as a prognostic factor, future studies should include a precise stimulation protocol and reactivity definition to facilitate guideline formation.


Assuntos
Encéfalo/fisiopatologia , Coma/fisiopatologia , Eletroencefalografia/métodos , Parada Cardíaca/fisiopatologia , Humanos , Prognóstico , Reprodutibilidade dos Testes
9.
Neurocrit Care ; 26(3): 362-370, 2017 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-28004332

RESUMO

BACKGROUND: The diagnosis of nosocomial bacterial ventriculitis in patients with subarachnoid hemorrhage (SAH) can be challenging. METHODS: We performed a retrospective study on the diagnostic accuracy of clinical and laboratory characteristics for the diagnosis of bacterial ventriculitis in 209 consecutive patients with an aneurysmal SAH admitted in a tertiary referral center from 2008 to 2010. Diagnostic value of clinical characteristics and inflammatory indexes in CSF and blood were determined for three diagnostic categories: (1) no suspicion for bacterial ventriculitis; (2) clinical suspicion for bacterial ventriculitis, defined as initiation of empirical antibiotic treatment for ventriculitis, but negative CSF cultures; and (3) CSF culture-positive bacterial ventriculitis. RESULTS: Empirical antibiotics for suspected ventriculitis was initiated in 48 of 209 (23 %) patients. CSF cultures were positive in 11 (5 %) patients. Within the group of suspected ventriculitis, only longer duration of CSF drainage and lower CSF red blood cell counts predicted for culture positivity. None of the other clinical features or inflammatory indexes in CSF and blood were associated with culture-proven bacterial ventriculitis. CONCLUSIONS: Nosocomial bacterial ventriculitis in patients with aneurysmal SAH is often suspected but confirmed by culture in a minority of cases. Improvement of diagnostics for nosocomial bacterial ventriculitis in patients with aneurysmal SAH is needed.


Assuntos
Infecções Bacterianas do Sistema Nervoso Central/líquido cefalorraquidiano , Ventriculite Cerebral/líquido cefalorraquidiano , Derivações do Líquido Cefalorraquidiano/efeitos adversos , Infecção Hospitalar/líquido cefalorraquidiano , Hemorragia Subaracnóidea/cirurgia , Antibacterianos/uso terapêutico , Infecções Bacterianas do Sistema Nervoso Central/tratamento farmacológico , Infecções Bacterianas do Sistema Nervoso Central/etiologia , Ventriculite Cerebral/tratamento farmacológico , Ventriculite Cerebral/etiologia , Infecção Hospitalar/tratamento farmacológico , Infecção Hospitalar/etiologia , Feminino , Humanos , Aneurisma Intracraniano/complicações , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos
10.
Neurocrit Care ; 24(2): 207-16, 2016 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-26432793

RESUMO

INTRODUCTION: Early identification of delayed cerebral ischemia (DCI) in patients with aneurysmal subarachnoid hemorrhage (aSAH) is a major challenge. The aim of this study was to investigate whether quantitative EEG (qEEG) features can detect DCI prior to clinical or radiographic findings. METHODS: A prospective cohort study was performed in aSAH patients in whom continuous EEG (cEEG) was recorded. We studied 12 qEEG features. We compared the time point at which qEEG changed with the time point that clinical deterioration occurred or new ischemia was noted on CT scan. RESULTS: Twenty aSAH patients were included of whom 11 developed DCI. The alpha/delta ratio (ADR) was the most promising feature that showed a significant difference in change over time in the DCI group (median -62% with IQR -87 to -39%) compared to the control group (median +27% with IQR -32 to +104%, p = 0.013). Based on the ROC curve, a threshold was chosen for a combined measure of ADR and alpha variability (AUC: 91.7, 95% CI 74.2-100). The median time that elapsed between change of qEEG and clinical DCI diagnosis was seven hours (IQR -11-25). Delay between qEEG and CT scan changes was 44 h (median, IQR 14-117). CONCLUSION: In this study, ADR and alpha variability could detect DCI development before ischemic changes on CT scan was apparent and before clinical deterioration was noted. Implementation of cEEG in aSAH patients can probably improve early detection of DCI.


Assuntos
Isquemia Encefálica/diagnóstico , Diagnóstico Precoce , Eletroencefalografia/métodos , Hemorragia Subaracnóidea/diagnóstico , Idoso , Isquemia Encefálica/etiologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Projetos Piloto , Estudos Prospectivos , Hemorragia Subaracnóidea/complicações
11.
Ecol Modell ; 340: 126-133, 2016 Nov 24.
Artigo em Inglês | MEDLINE | ID: mdl-27890965

RESUMO

Social bees are central place foragers collecting floral resources from the surrounding landscape, but little is known about the probability of a scouting bee finding a particular flower patch. We therefore developed a software tool, BEESCOUT, to theoretically examine how bees might explore a landscape and distribute their scouting activities over time and space. An image file can be imported, which is interpreted by the model as a "forage map" with certain colours representing certain crops or habitat types as specified by the user. BEESCOUT calculates the size and location of these potential food sources in that landscape relative to a bee colony. An individual-based model then determines the detection probabilities of the food patches by bees, based on parameter values gathered from the flight patterns of radar-tracked honeybees and bumblebees. Various "search modes" describe hypothetical search strategies for the long-range exploration of scouting bees. The resulting detection probabilities of forage patches can be used as input for the recently developed honeybee model BEEHAVE, to explore realistic scenarios of colony growth and death in response to different stressors. In example simulations, we find that detection probabilities for food sources close to the colony fit empirical data reasonably well. However, for food sources further away no empirical data are available to validate model output. The simulated detection probabilities depend largely on the bees' search mode, and whether they exchange information about food source locations. Nevertheless, we show that landscape structure and connectivity of food sources can have a strong impact on the results. We believe that BEESCOUT is a valuable tool to better understand how landscape configurations and searching behaviour of bees affect detection probabilities of food sources. It can also guide the collection of relevant data and the design of experiments to close knowledge gaps, and provides a useful extension to the BEEHAVE honeybee model, enabling future users to explore how landscape structure and food availability affect the foraging decisions and patch visitation rates of the bees and, in consequence, to predict colony development and survival.

12.
Solid State Nucl Magn Reson ; 71: 55-60, 2015 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-26453410

RESUMO

This work is motivated by the recent developments in online minerals analysis in the mining and minerals processing industry via nuclear quadrupole resonance (NQR). Here we describe a nuclear magnetic resonance (NMR) and NQR study of the minerals tennantite (Cu12As4S13) and tetrahedrite (Cu12 Sb4S13). In the first part NQR lines associated with (75)As in tennantite and (121,123)Sb isotopes in tetrahedrite are reported. The spectroscopy has been restricted to an ambient temperature studies in accord with typical industrial conditions. The second part of this contribution reports nuclear quadrupole-perturbed NMR findings on further, only partially characterised, metal arsenides. The findings enhance the detection capabilities of NQR based analysers for online measurement applications and may aid to control arsenic and antimony concentrations in metal processing stages.

13.
Solid State Nucl Magn Reson ; 71: 87-90, 2015 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-26298278

RESUMO

(75)As NQR spectra and relaxation times of synthetic and natural FeAs2 samples have been studied at variable static magnetic field and temperature. FeAs2 is a well understood diamagnetic semiconductor and occurs as the natural mineral lollingite in selected ore deposits. We observed a spin-spin relaxation time enhancement of up to five in synthetic powders in the presence of a weak external static magnetic field. The effect is of interest with regard to signal-to-noise ratio improvement for materials characterization applications where broad NQR absorption lines are excited with wideband pulse sequences.

14.
Neuroimage ; 99: 525-32, 2014 Oct 01.
Artigo em Inglês | MEDLINE | ID: mdl-24936682

RESUMO

The last two decades have seen an unprecedented development of human brain mapping approaches at various spatial and temporal scales. Together, these have provided a large fundus of information on many different aspects of the human brain including micro- and macrostructural segregation, regional specialization of function, connectivity, and temporal dynamics. Atlases are central in order to integrate such diverse information in a topographically meaningful way. It is noteworthy, that the brain mapping field has been developed along several major lines such as structure vs. function, postmortem vs. in vivo, individual features of the brain vs. population-based aspects, or slow vs. fast dynamics. In order to understand human brain organization, however, it seems inevitable that these different lines are integrated and combined into a multimodal human brain model. To this aim, we held a workshop to determine the constraints of a multi-modal human brain model that are needed to enable (i) an integration of different spatial and temporal scales and data modalities into a common reference system, and (ii) efficient data exchange and analysis. As detailed in this report, to arrive at fully interoperable atlases of the human brain will still require much work at the frontiers of data acquisition, analysis, and representation. Among them, the latter may provide the most challenging task, in particular when it comes to representing features of vastly different scales of space, time and abstraction. The potential benefits of such endeavor, however, clearly outweigh the problems, as only such kind of multi-modal human brain atlas may provide a starting point from which the complex relationships between structure, function, and connectivity may be explored.


Assuntos
Atlas como Assunto , Encéfalo/anatomia & histologia , Mapeamento Encefálico , Humanos
15.
Mol Hum Reprod ; 20(8): 745-55, 2014 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-24874554

RESUMO

p32 is a conserved eukaryotic protein which is primarily expressed in the mitochondria and regulates cell proliferation, migration and metabolism in various tissues. In this study, we sought to examine the expression and function of p32 in the human placenta. p32 was highly expressed in the syncytiotrophoblast, the underlying cytotrophoblast (CTB), the vascular endothelium and by a proportion of cells in the villous stroma in first trimester and term placenta. p32 mRNA and protein expression was significantly higher in the first trimester of pregnancy than at term, and expression in the trophoblast was significantly reduced in placentas from women with fetal growth restriction (FGR). Small interfering RNA (siRNA)-mediated knockdown of p32 in term placental explants significantly reduced the number of Ki67-positive CTB, but did not alter CTB apoptosis or necrosis. p32 knockdown increased lactate production, reduced glucose extraction from culture medium and was associated with reduced MitoTracker dye accumulation in trophoblast mitochondria. p32 knockdown was also associated with a significant reduction in expression of the mitochondrial respiratory complexes I and IV. These data suggest that p32 expression is important for CTB proliferation, via a mechanism involving regulation of normal mitochondrial function. As p32 expression is reduced in FGR placentas, this may contribute to some of the observed placental pathology, such as reduced CTB proliferation and mitochondrial dysfunction.


Assuntos
Proteínas de Transporte/metabolismo , Proteínas Mitocondriais/metabolismo , Trofoblastos/citologia , Trofoblastos/metabolismo , Proteínas de Transporte/genética , Proliferação de Células/genética , Proliferação de Células/fisiologia , Feminino , Retardo do Crescimento Fetal/genética , Retardo do Crescimento Fetal/metabolismo , Humanos , Imuno-Histoquímica , Técnicas In Vitro , Proteínas Mitocondriais/genética , Placenta/metabolismo , Gravidez , RNA Interferente Pequeno/genética , Reação em Cadeia da Polimerase em Tempo Real
16.
Eur J Neurol ; 21(6): 890-3, 2014 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-24628981

RESUMO

BACKGROUND AND PURPOSE: Median nerve somatosensory evoked potential (SEP) recordings play an important role in outcome algorithms in comatose patients after cardiopulmonary resuscitation. Knowledge of technical difficulties, clinical implications and uniform interpretation of SEP recordings is crucial. The aim of this study was to evaluate the skills of neurologists to interpret SEP recordings in post-anoxic patients. METHODS: Nationwide Dutch clinical neurophysiology examinations from 2007, 2008 and 2011, containing SEP related questions, were analysed. Participants were classified as neurology residents, neurologists with less than 10 years of experience, neurologists with more than 10 years of experience and clinical neurophysiologists. End-points were the knowledge of all participants about SEP recordings per year as well as improvement in knowledge over the years, as reflected by the test scores. RESULTS: A total of 194 participants completed the examination in 2007, 200 in 2008 and 263 in 2011. Between 2007 and 2008, all groups of respondents showed a significant increase in percentage of correct answers to SEP questions. Sixty-six participants completed all three examinations. The SEP score of this group improved in 2008 [75%, interquartile range (IQR) 50-75, P < 0.001] compared with 2007 (38%, IQR 38-50); there was no further improvement in 2011 (69%, IQR 54-77). CONCLUSION: Continuing education about technical knowledge, possible pitfalls and interpretation of SEP recordings remains of utmost importance.


Assuntos
Reanimação Cardiopulmonar , Potenciais Somatossensoriais Evocados/fisiologia , Hipóxia/fisiopatologia , Neurologia , Córtex Somatossensorial/fisiopatologia , Competência Clínica , Humanos , Nervo Mediano/fisiopatologia , Prognóstico
17.
J Neurosurg Sci ; 58(3): 129-44, 2014 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-24844173

RESUMO

The integration of longitudinal brain structure analysis with neurointensive care strategies continues to be a substantial difficulty facing the traumatic brain injury (TBI) research community. For patient-tailored case analysis, it remains challenging to establish how lesion profile modulates longitudinal changes in cortical structure and connectivity, as well as how these changes lead to behavioral, cognitive and neural dysfunction. Additionally, despite the clinical potential of morphometric and connectomic studies, few analytic tools are available for their study in TBI. Here we review the state of the art in structural and connectomic neuroimaging for the study of TBI and illustrate a set of recently-developed, patient-tailored approaches for the study of TBI-related brain atrophy and alterations in morphometry as well as inter-regional connectivity. The ability of such techniques to quantify how injury modulates longitudinal changes in cortical shape, structure and circuitry is highlighted. Quantitative approaches such as these can be used to assess and monitor the clinical condition and evolution of TBI victims, and can have substantial translational impact, especially when used in conjunction with measures of neuropsychological function.


Assuntos
Lesões Encefálicas/patologia , Conectoma , Neuroimagem , Animais , Mapeamento Encefálico , Humanos , Imageamento por Ressonância Magnética/métodos , Neuroimagem/métodos , Assistência Individualizada de Saúde
18.
Front Psychol ; 15: 1354997, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38899124

RESUMO

Introduction: Although Cognitive Behavioral Therapy (CBT) is the most often used intervention in forensic treatment, its effectivity is not consistently supported. Interventions incorporating knowledge from neuroscience could provide for more successful intervention methods. Methods: The current pilot study set out to assess the feasibility and usability of the study protocol of a 4-week neuromeditation training in adult forensic outpatients with impulse control problems. The neuromeditation training, which prompts awareness and control over brain states of restlessness with EEG neurofeedback, was offered in addition to treatment as usual (predominantly CBT). Results: Eight patients completed the neuromeditation training under guidance of their therapists. Despite some emerging obstacles, overall, the training was rated sufficiently usable and feasible by patients and their therapists. Discussion: The provided suggestions for improvement can be used to implement the intervention in treatment and set up future trials to study the effectiveness of neuromeditation in offender treatment.

19.
Neuroimage ; 80: 220-33, 2013 Oct 15.
Artigo em Inglês | MEDLINE | ID: mdl-23707579

RESUMO

Perhaps more than any other "-omics" endeavor, the accuracy and level of detail obtained from mapping the major connection pathways in the living human brain with diffusion MRI depend on the capabilities of the imaging technology used. The current tools are remarkable; allowing the formation of an "image" of the water diffusion probability distribution in regions of complex crossing fibers at each of half a million voxels in the brain. Nonetheless our ability to map the connection pathways is limited by the image sensitivity and resolution, and also the contrast and resolution in encoding of the diffusion probability distribution. The goal of our Human Connectome Project (HCP) is to address these limiting factors by re-engineering the scanner from the ground up to optimize the high b-value, high angular resolution diffusion imaging needed for sensitive and accurate mapping of the brain's structural connections. Our efforts were directed based on the relative contributions of each scanner component. The gradient subsection was a major focus since gradient amplitude is central to determining the diffusion contrast, the amount of T2 signal loss, and the blurring of the water PDF over the course of the diffusion time. By implementing a novel 4-port drive geometry and optimizing size and linearity for the brain, we demonstrate a whole-body sized scanner with G(max) = 300 mT/m on each axis capable of the sustained duty cycle needed for diffusion imaging. The system is capable of slewing the gradient at a rate of 200 T/m/s as needed for the EPI image encoding. In order to enhance the efficiency of the diffusion sequence we implemented a FOV shifting approach to Simultaneous MultiSlice (SMS) EPI capable of unaliasing 3 slices excited simultaneously with a modest g-factor penalty allowing us to diffusion encode whole brain volumes with low TR and TE. Finally we combine the multi-slice approach with a compressive sampling reconstruction to sufficiently undersample q-space to achieve a DSI scan in less than 5 min. To augment this accelerated imaging approach we developed a 64-channel, tight-fitting brain array coil and show its performance benefit compared to a commercial 32-channel coil at all locations in the brain for these accelerated acquisitions. The technical challenges of developing the over-all system are discussed as well as results from SNR comparisons, ODF metrics and fiber tracking comparisons. The ultra-high gradients yielded substantial and immediate gains in the sensitivity through reduction of TE and improved signal detection and increased efficiency of the DSI or HARDI acquisition, accuracy and resolution of diffusion tractography, as defined by identification of known structure and fiber crossing.


Assuntos
Encéfalo/anatomia & histologia , Encéfalo/fisiologia , Conectoma/métodos , Imagem de Tensor de Difusão/métodos , Aumento da Imagem/métodos , Modelos Anatômicos , Modelos Neurológicos , Animais , Humanos , Rede Nervosa/anatomia & histologia , Rede Nervosa/fisiologia
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